再用n2的时间（两重循环）枚举d-c，并将b-c的值作为键，在Hash数组中查找是否存在。如果能找到crucial相同的node点，则找到了一组满足 d-c = a+b的值。（注意检查a b c d 四个数不重复） All trademarks are either the property of Central Garden & Pet Company, its subsidiaries, divisions, affiliated and/or related firms or the home of their respective homeowners. 回復/查看 Commemorates the trails wh... https://pearlaquatics.my/what-kind-of-support-services-you-can-get-from-an-online-aquarium-store/